Malicious PDF — malware analysis report

Static analysis result for SHA-256 03f08a9f3c61097d…

MALICIOUS

PDF

80.2 KB Created: 2021-09-07 10:42:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 42dda1f68cbddef1d20e315030eb8fe8 SHA-1: b1c98c229d4e647ab3fc8ebe01c2e1947bc7aba7 SHA-256: 03f08a9f3c61097dd74325a20a67552d04e9351b64fa2392ec8c7c51d6654a67
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to potentially compromised CMS upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://we-plus.tw/ckfinder/userfiles/files/rimejepalakazexi.pdf In PDF document text
    • http://alde-pace.org/ckfinder/userfiles/files/senafidato.pdfIn PDF document text
    • https://spotiverify.com/ci/userfiles/files/99612509968.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/29688650348.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/sekujesukakiguniranogexop.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc8543cc4c---vubusixurike.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/kovenaropilisewore.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/vl2a1oih0rt0i0f4cpn3kbp5o0/sofufuf.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/32968932785.pdfIn PDF document text
    • http://clasesholandes.com/userfiles/file/lagotorejovorefij.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/4bdd480de0ede7c7d3a873890262cf51/54255403929.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210528_E7F8338721F974A3.pdfIn PDF document text
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/0bc9fcaa8f7021fb6528a978c6192b35/70142932835.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d360714086---41748032879.pdfIn PDF document text
    • http://aiskreunion.com/clients/b/b4/b417c2091670ce0b0d78f4b231aea02c/File/soxalojajugozuziviri.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/16762636564.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/sokaduwapedofejinepuk.pdfIn PDF document text
    • http://davidlbrooks.com/clients/868292/File/47395991418.pdfIn PDF document text
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/66012642b83bccc34d6b046480ff9f18/meguvalezetarewezugifaz.pdfIn PDF document text
    • https://digireg.org/upload/fafelakokeronu.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1834033b4---89375643145.pdfIn PDF document text
    • http://thetownsendfamily.net/clients/a/ab/ab79602242cca8f930cd52af13df1d51/File/63684883781.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee4e37b24dd---49099542877.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=alessandro+scarlatti+stabat+mater+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD117 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e929.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE929 18644 bytes
SHA-256: 5aec4a6714ad10bd8937860018fa4a1f322ffb21528aa21d11a65dd25d67ab47
font_02_sfnt_off00011a50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A50 10904 bytes
SHA-256: 1897a9fc463d71de446276d83ddf9d5f20bba07886e4eaee61308e571096452d

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